Improvement in rotary blowers



A S MITH ROTARY BLOWER Patented Feb. 4. 1862.

UNITED STATES PATENT OFFICE.

ADDISON SMITH, OF NEW YORK, N. Y.

IMPROVEMENT IN ROTARY B LOWERS.

Specification forming part of Letters Patent No. 34,318, dated February4, 1862.

To all whom it may concern.-

Be it known that I, ADDISON SMITH, of the city, county, and State of NewYork, have invented a new and Improved Rotary Blower; and I d1 herebydeclare that the following is a full, clear, and exact description ofthe same, reference being bad to the accompanying drawings, makingapart. of this specification, in which Figure 1 is a transverse verticalsection of my invention, taken in the line 00 m, Fig. 2; Fig. 2, alongitudinal vertical section of the same, taken in the line y 11 Fig.1.

Similar letters of reference indicate corresponding parts in the twofigures.

This invention consists in placing a cylinder having radial slidingpistons eccentrically within a cylindrical case, which is provided withan induction and eduction opening, the several parts being arranged ashereinafter fully shown and described, whereby the moving or runningparts may be operated at a very high rate of speed without beingsubjected to a great amount of Wear and tear, and the air which entersthe device during its operation forced out from it by the action of thepistons in connection with the case, the blast being produced on thesame principle as that produced by an ordinary bellows, and not likeordinary rotary fans or blowers produced by a vacuum formed by a rapidrevolution of a fan within a case.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents a cylindrical case, which may be constructed with woodenheads act and a sheet-metal body I). This case maybe of any desirabledimensions, and it is placed on suitable pedestals or supports 0 0. Atone side of the case A, near its lower part, there is aninduction-opening (Z, and an eduction eis at the opposite side of thecase. (See Fig. 1.)

Within the cylindrical case A there is placed a cylinder 13, which isprovided with a number of radial sliding pistons C. These pistons may beformed of metal plates, which extend the whole length of cylinder 13,the outer edges of the pistons G bearing against the inner surface ofthe bodyb of thecase A. The cylinder B is placed eccentrically withinthe case A, and it has a hollow shaft D, which is placed loosely on apermanent shaft E, the

latter being attached at one end to the head a, as shown clearly in Fig.2. In the inner side of the head a there is fitted concentrically arotary disk E, which has an annular groovef made in it near its edge. Inthis groo've f there are placed segments F, to which the pistons O atone end are attachedone to each. One of the segments F (designated by Fis firmly secured to the disk E, but the others are fitted loosely inthe groove f, and the disk E has its axisG extending through the header,and is provided at its outer part- With a driving-pulley H. The oppositeends of the pistons are attached to segments I, which are fitted looselyin an annular groove g in the inner side of the head a.

The operation of the machine is as follows: Power is applied to thepulley H, and the disk E consequently rotated. The cylinder B is rotatedfrom the disk E in consequence of the segment F being permanentlyattached to the disk E, the direction of the movement of the disk andcylinder being indicated by the arrows upon them, as shown in Fig. 1.

The pistons 0 form compartments it within the case A, each of whichfills with air while passing the induction-opening d, the pistons Chaving their edges kept in contact with the inner surface of b by. thesegments F I and grooves f g." The air is carried around within theupper part of the case A and is compressed and forced out of eachcompartment into the eduction-openiug e, as said compartments arecontracted as they approach the educt-ionopening owing to the eccentricposition of the cylinder B. (See Fig. 1.) The operation therefore, itwill be seen, is similar to that of abellows as it is forced out fromthe case A under pressure. The segments F in the disk E rotate with it;but the segments I necessarily travel entirely around the groove gin thehead a. 'llence those machines which are designed to have their cylinderB rapidly rotated are provided with a disk E at each end, as muchfriction and wear and tear are thereby avoided, but in those machineswhich are designed for a slow movement the disk E may be dispensed withand an annular groove made in the inner side of the head a, in which thesegments F move entirely around, like the segments I in the groove g. Ineither case the air will be received within and forced out from the caseA in precisely the same way.

2 same has its pistons O operated or drawn in and out, so that theirouter edges will be kept in contact with the inner surface of the bodyI) of the case A through the medium of the segments F I and grooves fg,eitheror both ofthe latter being stationary or rotating, substantiallyas described.

ADDISON SMITH.

\Vitnesses:

R. GAVVLEY, JAMES LAIRD.

